Paper-bag machine.



F. E. STRASBURG, DBGD.

T. HAWLEY, ADMINISTRATOR.

PAPER BAG MACHINE.

APPLICATION FILED JAN.12, 1909.

945,94. Patented Jan. 11,1910.

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F. E. STRASBURG, DEGD.

T. HAWLEY, ADMINISTRATOR.

PAPER BAG MACHINE.

APPLICATION FILED JANJZ, 1909.

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UNTTED STATES PATENT @FFTQE.

THEODORE I-IAWLEY, OF RUMFORD FALLS, MAINE, ADMINISTRATOR OF FREDERICKE. STRASBURG, DECEASED, ASSIGNOR T0 CONTINENTAL PAPER BAG COMPANY, A

CORPORATION OF MAINE.

PAPER-BAG MACHINE.

Application filed January 12, 1909.

T 0 all whom it may concern:

Be it known that FREDERICK E. STRAS- BURG, late a citizen of the UnitedStates, and a resident of Rumford Falls, in the county of Oxford andState of Maine, has invented certain new and useful Improvements inPaper-Bag Machines, of which the following is a specification.

This invention relates to paper bag machines and directly to that classthereof provided for making flat ba s from a continu ous flat paper tubeor for making square bags from a continuous paper tube having aninwardly folded tuck in each side thereof.

In the drawings accompanying this specification is illustrated a portionof a paper bag machine embodying one form of the improvements and whichmay be the preferred form thereof. Therein- Figure 1 is a plan view andFig. 2 is a sectional elevation on line 2, 2, of Fig. 1. Fig. 3 is aperspective view of a square paper bag in process of making.

The various parts and mechanism of the improved machine are mounted inside frames 3, 4. A pair of feed rolls 5, 6fixed to shafts 7, 8respectively are effective to support the delivery end of float 9 oftube forming mechanism, not shown, and for feeding the bag tube tocutting mechanism indicated in a general way at 10. Said cuttingmechanism is constructed in accordance with the invention of Smith setforth in U. S. Patent 818713 of Apr. 24, 1906, and comprises upperrotatable toothed blade 11 in engagement with the grooved upper face offloat 9 thereunder, and lower rotatable toothed blade 12 in engagementwith the grooved lower face of said float. To avoid complication in thepresent drawings the teeth of said blades 11, 12 and the grooves infloat 9 are not shown but they are all fully shown and described in saidPatent 818713 to which reference may be had. Upper blade 11 is fixed forrotation on shaft 110 mounted in suitable bearings in side frames 3, 4.Lower blade 12 is similarly fixed to shaft 120 similarly mounted in saidside frames. Just forward of lower blade 12 in the direction of travelof the bag tube, on shaft 130, is fixed roll 13 for supporting thedelivery end of float 9.

A table 14 fixed to rod 140 is provided for receiving the bag blank asit passes for- Specification of Letters Patent.

Patented J an. 11, 1910.

Serial No. 471,912.

wardly off from around float 9. Said table has its rear end 104projecting under the delivery end of said float and about midway thelength of said float is a rectangular cavity 1400 through which lowerfeed roll 16 projects for engagement with upper feed roll 15. Said rolls15, 16 are fixed to shafts 150, 160 respectively mounted for rotation inside frames 3, 4. Said rolls 15, 16 are driven at a surface speedsomewhat in excess of that of rolls 5, 6 and at the same surface speedas cylinder 20. Also said rolls 15, 16 are located forward of cuttingmechanism 10 a distance equal to a bag blank length so that immediatelyupon the severance of a bag blank portlon from the bag tube the leadingend of said bag blank portion passes into the grip of rolls 15, 16 andany possible remaining uncut filaments connecting said bag blank portionwith the bag tube are broken and sald portion is fed forward at theincreased speed.

Cylinder or carrier 20 is fixed to shaft 200 which in turn is mountedfor rotation in side frames 3, 4. Said cylinder is preferably providedwith a plurality of folding beds, in the present case four are shown, as17, 18. Each of said folding beds is provided with a side clip as 21 (offolding bed 17) on each side and near the forward end thereof. Said sideclips may be of any efiicient type but side clips such as shown andfully described in U. S. Patent to Smith 864435 of Aug. 27, 1907, havebeen chosen for illustration herein. Said side clips are pivoted in earsas 28, 29 of side clip 27 and are urged to engagement with the bag blankby means of springs as 30 of said side clip 27. The said clips areactuated by means of bell cranks as 22 of clip 21, pivoted at 23 on theside of and below folding bed 17. The lower arm of said bell-crank isprovided with roll 220 for engagement with the periphery of fixed cam24. Said cam is fixed to sleeve 240 fixed to and inreaching from frame3. On the opposite side of cylinder 20 cam 25 mounted in all wayssimilar to cam 24, is provided to actuate the several side clips on thatside of said cylinder.

Located above carrier 20 creaser 26 is fixed on shaft 260 mounted forrotation in frames 3, 4. Said creaser is timed to make one revolutionfor each passing folding bed and each folding bed is provided with agroove thereacross for coaction with said creaser. Said grooves arelocated adjacent to and in front of their respective side clips, as forinstance groove 31 of folding bed 19, Fig. 2.

The pasting mechanism is indicated in a general way at 40. Saidmechanism comprises the usual receptacle 41 fixed on rod 410 supportedin frames 3, 4. Mounted on shaft 42 swing frame 43 carries paste wheel44. Said frame may be secured in any desired position about the axis ofshaft 42 by clamp screw 45. Paste roll 44 is fixed to the inner end ofshaft 400 mounted for rotation in the free end of said frame 43 andengages the paste in receptacle 41. Fast to shaft 42 is fixed secondarypaste wheel 46 in rolling coaction with paste wheel 44 to take pastetherefrom. On shaft 470 is fixed paste transfer bar 47 to take pastefrom paste wheel 46 and deliver it to paster bar 49 adjustably fixed onshaft 490 for rotation therewith. Said paster bar in its turn deliversthe increment of paste 901 directly to the body of the bag blank and notas has heretofore been customary, to the flap 900, Fig. 3. By this meansa much tighter and more uniform joint is obtained when the flap isfolded over onto the body than by applying the paste to the flap.Cylinder 20, paster bar 49 and paste transfer bar 47 are actuated atequal surface speeds and some what in excess of the surface speed ofsecondary paste wheel 46 so that said paste transfer bar lifts from saidsecondary roll at each engagement therewith more paste than it would ifit were operated at equal surface speed therewith.

For folding over the seal flap as 900 of bag blank 90 (see Fig. 3) ontopaste ribbon 901 previously deposited by paster bar 49 on the bodyportion of the blank, the following mechanism is provided: Fixed toshaft 500 rotatably mounted in the free ends of swinging arms 501, 502is roll 50 positioned and actuated for rolling coaction with theperiphcry of cylinder 20 and the folding beds thereof. Arms 501, 502 aremounted for free movement on fixed shaft 51 supported in frames 3, 4.Said arms 501, 502 are limited in their movements about axial shaft 51by means of yoke arms 510, 511 respectively. Said arms are mounted onshaft 51 and may be fixed in any desired position thereon by clamps suchas clamp 55 of arm 510. Said yoke arm 510 has in ear there of set screw530 abutting against that side of post 5010 of arm 501 adjacent tocylinder 20. Said post 5010 is normally held against said set screw 530by spring 504 in ear 54 of said arm 510. Arms 511 and 502 are similarlyequipped for coaction at the other end of roll 50. By means of saidsprings roll 50 is urged toward cylinder 20 for engagement therewith andby means of adjusting screws as 530 said roll may be held off from saidcylinder any desired distance. Said roll is provided with a notch as 59in each side of the face thereof to accommodate the side clips, as 21,201, as they pass the said roll. Also at 60 a groove is formed entirelyacross the face of said roll so as to relieve the pasted portion 901 ofthe blank of undue pressure in passing said roll 50.

For turning up the seal flap 900 of the bag blank and directing itbet-ween roll 50 and the folding bed, rod 56 is provided. Said rod ismounted adjacent to the path of the folding beds and parallel with theaxis of carrier 20 in cars 57, 5S outstanding from arms 501, 502respectively. Discharge blades, as 61, mounted on rod 610, have theirupper horns projecting into circumferential grooves in cylinder 20, asfor instance horn 601 of blade 61 in groove 210. Belt 62 is provided tocarry away the finished paper bags.

Power is communicated to the machine and transmitted to the variousmechanisms as follows: On stud 37 outstanding from frame 4 is gear 33having pulley 39 fixed to the hub thereof. learwardly above and meshingwith said gear 38 is large gear 36 on stud 34. Small gear is fixed tothe hub of gear 36 and turns with it. Said small gear 35 meshes with anddrives lower cutter gear 33 and, through intermediate gear 32, lowerfeed gear 320 on shaft 8. Just inboard frame 4 gear 1020 on lower cuttershaft 120 drives gear 1010 on upper cutter shaft 110. Upper feed rollshaft 7 has gear 3020 fixed thereon meshing with gear 320 on lower feedroll shaft 8. On roll shaft 130 gear 1030 meshes with gear on stud 34. Forwardly above and meshing with pulley gear 38 is intermediate gear 380on stud 370. Gear 1060 on lower feed roll shaft 160 is driven by saidintermediate gear 380 and in turn drives gear 1050 on upper feed rollshaft 150. Said intermediate gear 380 also meshes with and drivescylinder gear 201 on cylinder shaft 200. Oreaser gear 261 on shaft 260is driven from cylinder gear 201. For driving the paster mechanism, gear409 on paster bar shaft 490 meshes with cylinder gear 201. Inboard frame4, also fixed to shaft 490, is gear 4090 of equal size with gear 409 andmeshing with equal gear 4070 on paste transfer shaft 470. Outboard frame4 fixed to shaft 470 is gear 407 smaller than gear 4070. Said gear 407meshes with large gear 461 on secondary paste wheel shaft 42 wherebypaste wheel 46 is rotated at a surface speed less than that of transferbar 47. On shaft 42 between gear 461 and frame 4 is fixed gear 460meshing with gear 404 fixed to paste wheel shaft 400. For driving flapfolding roll 50, intermediate gear 63 on stud The operation of theimproved machine is i as follows: Continuous paper tubing, suitablyfolded and pasted and if desired, as

illustrated in Fig. 3, having an inwardly folded tuck in each sidethereof, being supplied around float 9 and into the grip of feed rolls5, 6, the machine is started. Said paper tubing is then fed forward inthe direction of arrow 70, that portion of said tube lying below float 9passing into engagement with lower cutter 12 and that portion lyingabove that float into engagement with upper cutter 11, and a bag blanklength thereby severed from the tube. Prior to its severance from thebag tube the leading end of said bag blank portion has passed off fromthe forward end of float 9 and onto table 14k and thence simultaneouslywith the operation of upper cutter 11 passes into the grip of rolls 15,16. By these rolls the now entirely severed bag blank is advanced at aspeed greater than that of the bag tube and equal to that of theperiphery of cylinder 20, to one of the folding beds on which said blankis now delivered. The mechanism is timed to deliver the bag blank onto afolding bed, as 17 in position for side clips, as 21, 201 to grip therespective sides of the blank a short distance rearward of its leadingend (see Fig. Said side clips close upon the bag blank as rolls 220, 221pass to the low parts of their respective cams 24, 25. The bag blankthen passes under creaser 26 which in coaction with the creaser groove(as 31 of folding bed 19) forms a crease across the whole width of saidblank and causes the seal flap, as 900, thereof to fold upwardly (seeFig. Passing onwardly with the rotation of cylinder 20 the bag blankapproaches the pasting mechanism. At this time paste transfer bar 47,rotating at a speed in excess of that of paste transfer roll 46, wipestherefrom a portion of paste and in turn delivers said portion to pasterbar I9 by which it is rolled onto the body portion of the bag blank justrearward of the side clips, as at 901 Fig. 3. The bag blank continuingits onward movement now presents its lifted front flap, as 900, to rod56 by which it is further folded over toward the body of the blank andinto position to pass into the bite between roll 50 and the folding bed.As the now folded over forward end of the bag blank passes into the gripof roll 50 and the folding bed, notches as 59 in the sides thereofprovide room for the side clips, as 21, 201, to pass and the edges ofgroove 60 press down seal flap 900 011 each side of paste ribbon 901without unduly squeezing said paste ribbon to cause it to exude fromunder said seal flap. The side clip rolls thereupon pass to the highparts of cams 24, 25 respectively, causing the side clips to releasetheir hold on the completed bag which is then lifted from the foldingbed by discharge blades 61 and delivered thereover to belt 62.

I claim:

1. In a machine for making flat and square paper bags, the combinationof a rotating folding bed, means for holding a bag blank thereon, rotarymeans for forming a crease across the bag blank, a rotating paste wheel,means for supplying paste thereto, a rotary paste transfer bar forwiping paste from the paste wheel at a speed in excess of that of saidwheel, and rotating means for taking said paste from the paste transferbar and applying it to the bag blank, means for folding down the sealflap of the bag blank and means for discharging the bag from themachine.

2. In a machine for making flat and square paper bags, the combinationof a rotating carrier having a plurality of folding beds, each foldingbed having means for holding a bag blank thereon, rotary means forforming a crease across the bag blank, a rotary paste wheel, means forsupplying paste thereto, a rotating paste transfer bar for wiping pastefrom the paste wheel at a speed in excess of that of said wheel, and

rotating means for taking said paste from the paste transfer bar andapplying it to the bag blank, means for folding down the seal flap ofthe bag blank and means for discharging the bag from the machine.

3. In a machine for making flat and square paper bags, the combinationof a rotating folding bed, means for holding a bag blank thereon, rotarymeans for forming and sealing the bottom of the bag comprising arotating paste wheel, means for supplying paste thereto, a rotatingpaste transfer bar for wiping paste from the paste wheel at a speed inexcess of that of said wheel, a rotating paste bar for taking paste fromthe paste transfer bar and applying it to the bag blank and means fordischarging the bag from the machine.

at. In a machine for making flat and square paper bags, the combinationof a rotating carrier having a plurality of folding beds thereon, eachfolding bed having means for holding a bag blank thereon, and thefollowing unitary instrumentalities for coaction with the successivefolding beds, to wit: rotary means for forming and sealing the bottom ofthe bag comprising a rotating paste wheel, means for supplying pastethereto, a rotating paste transfer bar for wiping paste from the pastewheel at a speed in excess of that of said wheel, a rotating paster barfor taking paste from the paste transfer bar and applying it to the bagblank and means for discharging the bag from the machine.

5. In a machine for making flat and square paper bags, the combinationof r0- tary means for severing the bag tube, a rotating folding bed forreceiving the severed bag blank, means for holding the bag blankthereon, rotary means for forming a crease across the bag blank, arotating paste Wheel, means for supplying paste thereto, a rotatingpaste transfer bar for taking paste from the paste Wheel and actuated ata speed in excess of that of the paste Wheel, a rotating paster bar fortaking paste from the paste transfer bar and rolling it onto the body ofthe bag blank, a fixed member positioned for engaging the seal flap ofthe passing bag blank and folding it down toward the body of the blank,a rotating ironing roll for coaction with the folding bed for pressingdown the seal flap onto the body of the blank, said ironing roll havinga groove thereacross to relieve the paste bearing portions of the bagblank of undue pressure While being sealed, and means for dischargingthe bag from the machine.

Signed at Rumford Falls, Maine, this i eighth day of January, 1909,before tWo subscribing Witnesses.

THEODORE I-IAWLEY, Administrator of the estate of the late F766lem'eltE. Strasbaw, deceased. Witnesses:

JOHN P. SHEPHERD, HERBERT P. LYON.

